HPMC Ophtal

Similar inconsistencies are seen in critical analyses of the information given for HPMC products (Fig. 30). Visco Shield , for example, is listed as having a far higher molecular weight and supposedly a distinctly lower viscosity at rest than HPMC Ophtal H, although their concentrations are cited as being the same. These variations prove that manufacturer information should be critically studied. 

HPMC products can be stored at room temperature. Recommended cannula sizes for injection are between 20 G (Ocucoat ) and 25 G (HPMC Ophtal L), i.e., wider cannula openings, as the pseudoplastic character of these viscoelastics is far less highlighted than in hyaluronic acid viscoelastics (see above). 

With HPMC products, viscosity at rest was hardly demonstrable, as expected. The exception was made by HPMC Ophtal H and LA GEL which showed higher viscosity, such as seen in some hyaluronic acid products. In contrast, Adatocel Acri-visc HPMC Ophtal L Coatel PeHa-Visco and Ocucoat all showed rather low zero shear viscosity values (Fig. 36, Table 6). 

PteHa-Visco Ocucoat Coatd HPMC Ophtal L Acrivisc Adatocel Visco Shield WMC Ophtal H... 

Acrivisc Adatocel HPMC Ophtal L Coatel Ocucoat P -Visco ViscoShieM HPMC Ophtal h ... 

Viscorneal AHemsc Plus Ktab)n5 Vburoal MicravLve Plus Morefatr Oil HPMC Ophtal H HPMCOphlHl 1/... 

Product Acri Vise Adatocel Coatel HPMC-Ophtal L HPMC -OphtaJ H LA GEL ... 

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